established
【已确立的,已获确认的,确定的】
established 已确立的,已获确认的,确定的
establish 创建; 建立(尤指正式关系); 证实; 使被接受
Gryspeerdt's team established that contrails are lasting longer than ever before because planes have started flying at a higher altitude.
格雷斯皮尔特的团队确定,由于飞机开始在更高的高度飞行,痕迹的持续时间比以往任何时候都长。